I can easily understand how introverted teachers would be at risk of burning out. Contact hours are stressful and people who are introverted need time to recharge. But here's the thing - wouldn't introverted students also be at risk of burnout? After all, when you're in school, you're on stage all day every day. There's no real personal time. If you're thinking that makes sense, though, wait. 'Introverted' is one of those hated 'learning styles' (in particular, it's part of the Myers-Briggs scale). And the learning-styles-sceptics say that it has no impact on educational outcomes. So it just doesn't matter if some students are stressed. Just throw them into group-learning and social-interaction activities all day. Nor, I guess, would it matter if teachers are stressed either. No - none of this makes sense. It does matter whether you're introverted or not - doesn't it?